Compare Reference Electrode Kits

Full Name of Reference Electrode Formula Chemical Used Description/Notes Compare to:
Mercury/ Mercury Oxide Electrode Kit (5088) Hg/HgO Our standard conc. is 20% KOH

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Mercury (II) oxide, also called mercuric oxide or simply mercury oxide, has a formula of HgO. Safe for use in alkali or fluoride media. All plastic construction.

 -579 vs.

MSE (sat. potassium sulfate)

Mercury Sulfate Electrode Kit K2SO4 (5100P) Hg/HgSO Sat. Potassium Sulfate Solution The Hg/HgSO Reference Electrode is recommended when chloride ion is not desired in the electrolyte.  Has a filling solution of potassium sulfate. +410 vs. SCE
Mercury Sulfate & Acid Electrode Kit (5100A) Hg/HgKO Sulfuric Acid Mercury-Mercurous sulfate reference electrodes, has been widely used in the past, in order to measure half-cell potentials in lead-acid batteries. -70 vs. MSE (sat. potassium sulfate)
Saturated Calomel Electrode Kit SCE (1001) HgCl Mercury(I) chloride Sat. KCL Solution The universal standard reference.  The Saturated Calomel Electrode (SCE) is a reference electrode based on the reaction between elemental mercury and mercury (I) chloride. -410 vs. Hg/Hg2SO4
Silver/ Silver Chloride Electrode Kit (1004) Ag/AgCl Silver (I) Chloride Sat. KCL/AgCI The silver chloride electrode is the most commonly used reference electrode for testing cathodic protection corrosion control systems in sea water environments. -47 vs. SCE
Silver/ Silver Sulfate Electrode Kit (1003)  Ag/AgSO  Sulfuric acid disilver(I) salt         Saturated potassium sulfate and silver A reproducible and stable electrode potential, situated 38.4 mV positive with respect to that of the Hg/HgSO couple. The preparation and application of a simple silver/silver sulfate reference electrode for an aqueous solution, which can be used as an alternative in chloride-free systems.  +38 vs. Hg/Hg2SO4